package com.config.config;

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.OptimisticLockerInnerInterceptor;
import com.baomidou.mybatisplus.extension.plugins.pagination.optimize.JsqlParserCountOptimize;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * Mybatis-plus分页插件
 */
@MapperScan ("com.config.mapper")//扫描mapper文件夹
@EnableTransactionManagement
@Configuration //配置类
public class MybatisPlusConfig {
	//注册乐观锁插件
	@Bean
	public OptimisticLockerInnerInterceptor optimisticLockerInnerInterceptor(){
		return new OptimisticLockerInnerInterceptor();
	}
	//分页插件
	@Bean
	public PaginationInterceptor paginationInterceptor() {
		PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
		// 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求  默认false
		// paginationInterceptor.setOverflow(false);
		// 设置最大单页限制数量，默认 500 条，-1 不受限制
		// paginationInterceptor.setLimit(500);
		// 开启 count 的 join 优化,只针对部分 left join
		paginationInterceptor.setCountSqlParser(new JsqlParserCountOptimize(true));
		return paginationInterceptor;
	}
	// @Bean
	// public MybatisPlusInterceptor mybatisPlusInterceptor() {
	// 	MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
	// 	interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.H2));
	// 	return interceptor;
	// }
	//
	// @Bean
	// public ConfigurationCustomizer configurationCustomizer() {
	// 	return configuration -> configuration.setUseDeprecatedExecutor(false);
	// }
}
